Contradictionary explanation of the "insertColumn" statement in the manual

I feel very confused about the description of the "instertColumn" command explanation, which reads as:

"The method insertColumn adds an empty column to the right of a column to the TableFile, designated by <path>. Plant Simulation shifts all columns with an index equal to or greater than any one position to the right."

Either the new column is added at the column given by the parameter and PlantSimulation shifts all columns with an index equal or greater than the given parameter, or it is added right of the given position, where PlantSimulation shifts only those columns with an index larger than the given parameter.

Both doesn't work at the same time and leaves the user highly confused.